package com.atguigu.gulimall.product.service.impl;

import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import com.atguigu.gulimall.product.vo.AttrGroupWithAttrsVo;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.service.AttrGroupService;
import org.springframework.util.StringUtils;


@Service("attrGroupService")
public class AttrGroupServiceImpl extends ServiceImpl<AttrGroupDao, AttrGroupEntity> implements AttrGroupService {

    @Autowired
    AttrService attrService;



    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrGroupEntity> page = this.page(
                new Query<AttrGroupEntity>().getPage(params),
                new QueryWrapper<AttrGroupEntity>()
        );

        return new PageUtils(page);
    }


    public PageUtils queryPage(Map<String, Object> params, Long catelogId) {

        String key = (String) params.get("key");
        QueryWrapper<AttrGroupEntity> wrapper = new QueryWrapper<>();
        if (!StringUtils.isEmpty(key)){
            wrapper.and((obj)->{
                obj.eq("attr_group_id",key).or().like("attr_group_name",key);
            });
        }

        if (catelogId==0){
            IPage<AttrGroupEntity> page = this.page(new Query<AttrGroupEntity>().getPage(params),
                  wrapper);
            return new PageUtils(page);
        }else {

            wrapper.eq("catelog_id",catelogId);

            IPage<AttrGroupEntity> page = this.page(new Query<AttrGroupEntity>().getPage(params), wrapper);
            return new PageUtils(page);
        }

    }

    /**
     * 根据分类id，查出分类下的所有的分组，以及分组下所有的属性
     * @param catelogId
     * @return
     */
    public List<AttrGroupWithAttrsVo> getAttrGroupWithAttrsByCatelogId(Long catelogId) {
        //1.查询分组信息
        List<AttrGroupEntity> groupEntities = this.list(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));

        //2.查询每个分组下的所有属性
        List<AttrGroupWithAttrsVo> collect = null;
        if (groupEntities!=null && groupEntities.size()>0){
                collect= groupEntities.stream().map((group) -> {
                AttrGroupWithAttrsVo attrGroupWithAttrsVo = new AttrGroupWithAttrsVo();
                BeanUtils.copyProperties(group, attrGroupWithAttrsVo);
                List<AttrEntity> attrs = attrService.getRelationAttr(group.getAttrGroupId());
                attrGroupWithAttrsVo.setAttrs(attrs);
                return attrGroupWithAttrsVo;
            }).collect(Collectors.toList());
        }
        return collect;
    }

}